Baby Boy Growth Chart 0-24 Months: Average Weight & Height

In the first two years, babies grow quickly, so it’s important for parents to track their progress. Whether breastfed or formula-fed, it's natural to wonder if your baby boy is developing at a healthy pace.

This guide, based on WHO growth standards, provides month-by-month ideal height and weight (in kg) for baby boys from 0 to 24 months. Learn how to measure your baby and read the growth chart—so you can easily track your baby’s development.

The chart shows a percentile where height/length and weight are plotted against age. It uses data from many children, with average measurements for each age.

The growth parameters include weight (kg), height (cm), and head and chest circumferences. These are tracked to monitor development.

In India, the WHO Child Growth Standards (2006) are used to assess the growth of male children, ensuring they develop healthily at the right pace.

Factors Affecting Growth After Birth

Several factors affect your baby boy's growth after birth. Here's an overview:

• Genetics: The genes passed from the parents primarily impact the baby's height and weight.
• Gestational Age: Premature babies tend to have lower weight and height than full-term babies.
• Hormones: Hormonal imbalances, such as low thyroid levels, can slow growth. Therefore, monitoring hormone levels during pregnancy is important.
• Mother's Health: Conditions like gestational diabetes, smoking, alcohol use, and weight gain during pregnancy can affect growth.
• Feeding Method: Formula-fed babies may gain weight faster in the first year.
  Sleep: Babies who sleep soundly tend to grow better.

Indian Baby Boy Growth Trends

Growth patterns for Indian babies may differ from global averages, but there are general trends in tracking your baby boy's development. Here’s a summary of key weight and height milestones:

Indian Baby Boy Weight Growth Rate
The birth weight of a full-term baby boy in India ranges between 2.5 kg and 4 kg.

• Babies double their birth weight by 4 to 6 months.
• Babies triple their birth weight by 12 months (1 year).
• By 24 months (2 years), a baby is usually 4 times their birth weight.

Indian Baby Boy Height Growth Rate

• A baby’s height increases by about 50% by 12 months (e.g., a 50 cm newborn grows to ~75 cm).
• By 24 months, their height is roughly 1.5 times their birth height (~85–90 cm for most babies).
• After 2 years, growth slows down, and most children grow about 5–7 cm per year.

Understanding these growth milestones is most helpful when you can accurately interpret the growth chart for baby boys. Continue reading to learn how to map your baby boy's progress.

To use the baby boy growth chart, start by finding your child's age along the top or bottom of the chart. Then, locate the corresponding height and weight on either side of the chart.

You'll see multiple lines representing different percentiles at each age point. Find where your child's measurements intersect with these lines, and note the number (5, 10, 25, 50, 75, 90, 95, etc.) next to the specific percentile curve.

For example, if your baby’s measurements match the 95th percentile line, it means they are taller and/or heavier than 95% of other children their age. If your baby falls in the 5th percentile, it means they are in the lower 5%, showing slower growth than others.

It’s important to note that the WHO growth standards do not include data for premature infants or babies with very low birth weights (under 1.5kg). These infants may have different growth patterns and may not catch up in early childhood. Regular monitoring with medical advice is recommended in such cases.

Percentiles and Its Significance

Percentiles on the growth chart show how your baby’s growing compared to other children. A higher percentile means your baby is taller or heavier than most children their age. The 50th percentile represents average growth for their age, while the 95th percentile indicates superior growth.

Percentiles are a helpful tool for identifying growth concerns, but they only show a part of the picture. The most important consideration is the overall trend in your baby’s growth over time.

When using a baby growth chart, focus on the rate of growth rather than just the percentile numbers. Growth charts are meant to track the overall trend of your baby’s development, ensuring their growth follows a steady pattern.

Even if a baby falls into a lower percentile, as long as they consistently grow along that line, it is not a cause for concern.

Baby Boy Weight in kg: 0 to 24 months

A baby boy’s weight changes significantly in the first two years of life. At birth, the average weight of a full-term baby (37 to 40 weeks) ranges between 2.5 to 4 kg.

Newborn Weight Changes (0-1 Month)

It is normal for babies to lose up to 10% of their birth weight in the first few days due to fluid loss. Breastfed babies may lose 5–7%, while formula-fed babies may lose 3–5%.

By 2-3 weeks, most babies regain their birth weight, marking a healthy start to their growth curve.

Weight Gain Milestones: 1-24 Months

Growth in the first two years follows a pattern of rapid weight gain, influenced by nutrition, genetics, and overall health. Here’s an approximate Indian baby boy weight chart in kg:

Having discussed baby boy weight milestones in kg, let’s explore the growth patterns for height during the first two years of life.

Baby Boy height 0 to 24 months

The height at birth for full-term Indian male infants is approximately 50 cm, usually ranging between 46 cm and 55 cm.

Baby Boy's Height vs. Standing Height

Newborns are measured in height as they cannot stand upright in the initial months. Standing height is recorded only after 24 months. Since posture changes naturally, standing height may be slightly shorter than lying-down height .

Indian Baby Boy Height by Age

Below is a general guideline of approximate height for baby boys from birth to 24 months:

Baby Boy Head Circumference: 0 to 24 months

Besides weight and height, tracking head circumference helps monitor healthy brain growth.

At birth, the average head circumference for a baby boy is around 34 cm, with a normal range of 32 cm to 36 cm.

Head Circumference Growth Milestones
 

• 0 to 12 months: The head grows rapidly during the first year, increasing by approximately 1 cm per month in the first 3 months, then slowing to 0.5 to 1 cm per month by 6 - 12 months. By 12 months, the average head circumference is about 44 - 48 cm.
• 12 to 24 months: Growth slows further, with an increase of around 1 cm per month, reaching approximately 47 - 50 cm by 2 years.

Here are some approximate values for the head circumference of an Indian baby boy month-by-month:

Monitoring head circumference at regular check-ups helps track brain development and identify potential issues. Consistent growth is usually a positive sign, even at a lower percentile.

How To Measure Baby Boy Height and Weight?

Measuring Baby Boy Height 
Lay your baby on a flat surface, stretch their legs straight, and measure from head to heel using a baby height chart or measuring tape.

Measuring Baby Boy Weight
For accurate results, use a digital baby scale on a flat surface and weigh your baby with minimal clothing.

Measuring Head Circumference of Baby Boy
Place a soft measuring tape around the widest part of your baby’s head, just above the eyebrows and ears, ensuring a snug but not tight fit.

Tracking these measurements helps you understand your baby’s growth journey. Let’s look at the baby boy’s growth journey, developmental milestones and progress.

Understanding your baby boy’s growth patterns from 0 to 24 months can help you track his development and ensure healthy growth. Let’s explore the ideal weight and height milestones for each stage.

Ideal Baby Boy Weight and Height at 3 Months
By 3 months, most baby boys weigh between 5 - 7 kg, having regained their initial newborn weight loss within the first few weeks. They continue to gain 600–800 grams per month, maintaining steady growth.

Their average height ranges from 58 - 64 cm, with growth slightly slowing compared to the rapid increase seen in the first two months.

Around this stage, many baby boys develop better head control and show improved hand-eye coordination, marking an important milestone in their physical development.

Baby Boy Weight and Height at 6 Months
By 6 months, most baby boys weigh 7 - 8.5 kg, with a steady weight gain of around 400–600 grams per month. By this stage, their birth weight typically doubles.

As teething begins around 6 months, some babies may experience temporary changes in appetite, which can influence their weight gain.

At 6 months, the average height of a baby boy ranges from 64 - 70 cm, continuing a gradual yet steady increase. At this age, many babies start rolling over, sitting with support, and displaying increased curiosity about their environment.

Baby Boy Weight and Height at 9 Months
By 9 months, most baby boys weigh between 8 - 9.5 kg, with weight gain slowing as they become more active, particularly with crawling, which can reduce the rapid weight gain seen in the first 6 months.

Their height typically ranges from 68 - 74 cm, and they continue to grow steadily. At this stage, many babies can sit without support, begin crawling, and may even start pulling themselves up to stand.

Baby Boy Weight and Height at 12 Months
At 12 months, most baby boys weigh 9 - 10.5 kg, having tripled their birth weight. Weight gain slows to about 300–500 grams per month as babies become more active, burning off more calories.

Their height typically ranges from 72 - 78 cm. They continue to grow but at a relatively slower pace. Growth may vary as babies transition to solid foods and reduce their formula or breast milk intake.

At this stage, babies not only explore new textures and tastes with solid foods but also begin standing with support and may take their first steps.

Baby Boy Weight and Height at 15 Months
At 15 months, growth in both weight and height slows significantly as toddlers become more active. Most baby boys weigh 9.5 - 11 kg and measure 75 - 81 cm tall, showing continued but gradual growth.

At this stage, many toddlers are walking independently, babbling, and using simple gestures to communicate. A balanced diet is important to support their growth, especially as their appetite may fluctuate during this phase.

Baby Boy Weight and Height at 18 Months
At 18 months, baby boys typically weigh 10 - 11.5 kg, and their growth is steady but slower as toddlers may become pickier with food.

Their height usually ranges from 78 - 84 cm, with growth slower than earlier stages. This is an important milestone as toddlers become more active, start climbing furniture, and attempt to say more words.

Baby Boy Weight and Height at 21 Months
By 21 months, most baby boys weigh between 10.5–12 kg, with a gradual weight gain of 200–400 grams per month as they become more physically active.

Their height typically ranges from 80–87 cm, with overall growth beginning to stabilise as they approach the 2-year mark.

At this stage, toddlers often show increased independence, start running, and may begin forming two-word sentences.

Baby Boy Weight and Height at 24 Months
At 24 months (2 years), most baby boys weigh 11 - 12.5 kg, with slower weight gain.

Their height typically ranges from 82 - 90 cm, influenced by genetics and nutrition.

By this age, most toddlers are running, climbing, and speaking in short phrases, reflecting significant progress in both physical and cognitive development.

Tracking your baby boy's growth during the first two years is crucial to ensure healthy development. Using the WHO growth chart as a reference, you can monitor milestones like weight, height, and head circumference to assess progress.

While percentiles offer valuable insight, remember that consistent growth is more important than the exact numbers. Factors like genetics, feeding methods, and sleep influence your baby’s growth and development.

Regular check-ups and measuring key growth indicators ensure your baby is healthy and growing properly.